Effects of low inclusion levels of dried drumstick tree Moringa oleifera leaves into the diets of rainbow trout, Oncorhynchus mykiss, on growth, feed conversion and some blood parameters

Planta Medica ◽  
2015 ◽  
Vol 81 (16) ◽  
Author(s):  
T Stadtlander ◽  
C Tonn
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Moringa Oleifera ◽  
Blood Parameters ◽  
Feed Conversion ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Moringa Oleifera Leaves ◽  
Drumstick Tree

scholarly journals Growth, survival, and body composition of rainbow trout, Oncorhynchus mykiss, when dietary fish meal is replaced with silkworm (Bombyx mori) pupae

2016 ◽  
Vol 24 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Matin Shakoori ◽  
Hamed Gholipour ◽  
Samira Naseri ◽  
Hossein Khara
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Specific Growth ◽  
Feed Conversion ◽  
Sr Protein ◽  
Treatment Groups ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Silkworm Pupae ◽  
Dietary Fish

Abstract The effects of substituting fishmeal (FM) with different quantities of silkworm pupae (SP) on the growth, survival, and body composition of rainbow trout, Oncorhynchus mykiss (Walbaum), were investigated over the course of a 60-day experiment. A total of 360 fingerlings (55±3.42 g) were randomly allotted to four treatment groups (T1 – fish fed 52.5% FM; T2 – fish fed 5% SP + 47.5% FM; T3 – fish fed 10 % SP+ 42.5% FM; T4 – fish fed 15% SP + 37.5% FM). Each treatment group was divided into three replicates of 30 fish per replicate. One group served as the control. At the end of the experiment, the results showed that 10% of FM can be replaced with SP without any adverse effects on the values of the feed conversion ratio (FCR), specific growth rate (SGR), weight gain percent (WG), condition factor (CF), survival rate (SR), protein content, lipid content, or nutrition protein utilization (NPU).

scholarly journals Cinnamon Promotes Growth Performance, Digestive Enzyme, Blood Parameters, and Antioxidant Activity of Rainbow Trout (Oncorhynchus mykiss) in Low-Carbohydrate Diets

2021 ◽  
Vol 21 (07) ◽  
pp. 309-322
Author(s):  
Mitra Ravardshiri ◽  
Somayeh Bahram ◽  
Seyed Rohollah Javadian ◽  
Masoumeh Bahrekazemi
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Digestive Enzyme ◽  
Density Lipoprotein ◽  
Blood Parameters ◽  
Control Group ◽  
Carbohydrate Diet ◽  
Low Carbohydrate Diet ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Low Carbohydrate

This study was conducted to investigate the effect of cinnamon in high- and low carbohydrate diets on the physiology of rainbow trout (Oncorhynchus mykiss (16.12±1.33 g). Six experimental diets including control/LCarb (200 g/kg carbohydrate), LCarb-3C (200 g/kg carbohydrate, 30 g/kg cinnamon), LCarb-5C (200g/kg carbohydrate, 50 g/kg cinnamon), HCarb (300 g/kg carbohydrate), HCarb-3C (300 g/kg carbohydrate, 30 g/kg cinnamon), and HCarb-5C (300 g/kg carbohydrate, 50 g/kg cinnamon) were formulated to feed fish for eight weeks. The results showed that fish fed dietary LCarb-3C (72.64 g) and LCarb-5C (73.17 g) had higher weight gain as compared with treatments without cinnamon (P<0.05). Blood performance in LCarb3C (67.10) was significantly higher than the HCarb-3C group (P<0.05). Fish fed dietary LCarb-3C had the best performance so that cinnamon in this group lowered glucose, total cholesterol, and low-density lipoprotein, improved total protein, and highdensity lipoprotein contents. Supplementation of this herb also improved protease and lipase in LCarb-3C and LCarb-5C groups as compared with control. Individuals fed supplemented diets but not HCarb had a higher superoxide dismutase activity when compared with the control group (P<0.05). Generally, cinnamon improved parameters in this study in fish fed a low-carbohydrate diet rather than a high-carbohydrate diet.

scholarly journals Sublethal Cobalt Toxicity Effects on Rainbow Trout (Oncorhynchus mykiss)

2019 ◽  
Vol 77 (4) ◽  
pp. 243-252
Author(s):  
Fereshteh Nasri ◽  
Saeed Heydarnejad ◽  
Amin Nematollahi
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Specific Growth ◽  
The Body ◽  
Cobalt Concentration ◽  
Feed Conversion ◽  
Control Value ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Toxicological Studies ◽  
Essential Trace Elements

Abstract The purpose of this study was to investigate the sublethal Co toxicity on rainbow trout (Oncorhynchus mykiss). Trout were exposed to Co and selected parameters were evaluated at intervals of 1, 15 and 30 days. Fish exposed to higher levels of Co grew slower than fish exposed to lower levels of Co. Weight gain, specific growth rate (SGR) decreased linearly with the increase of cobalt in the water. The body condition factor (CF) of fish reared in water with low cobalt concentration decreased substantially but this decrease was not significant for fish exposed to higher cobalt concentration. The values of the feed conversion ratio (FCR) increased in fish exposed to higher levels of Co. Co significantly changed the activity of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) and decreased at day 30, and in both cases this decrease was more remarkable at day 15 so that the level of AST and ALT reached the control value at day 30. The alkaline phosphatase (ALP) level also showed a remarkable 15-day decline. There was a significant increase in glucose (G) concentration in both Co-exposed groups on day 15. However, serum cholesterol (Chl) was significantly reduced on day 15 and increased on day 30; there were no significant differences in both exposed Co-groups. The triglyceride (TG) level also decreased substantially. There was no regular pattern of total protein (TP) in the serum, so that no significant differences were found in the level of TP between low and high-exposed fish. In summary, this study suggests that exposure of essential trace elements such as cobalt may change growth and biochemical parameters, and that measurement of these parameters may be used in toxicological studies to determine the general health status of fish.

Behavioural and metabolic effects of chronic exposure to sublethal aluminum in acidic soft water in juvenile rainbow trout (Oncorhynchus mykiss)

1999 ◽  
Vol 56 (4) ◽  
pp. 670-678 ◽  
Author(s):  
C J Allin ◽  
R W Wilson
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Blood Parameters ◽  
Metabolic Effects ◽  
Swimming Behaviour ◽  
Feeding Rates ◽  
Aluminum Exposure ◽  
Juvenile Rainbow Trout ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Index Of Exposure

Triplicate groups of 15 softwater-acclimated juvenile rainbow trout (Oncorhynchus mykiss) were randomly allocated to one of three treatments: pH 6.5 with no aluminum, pH 5.2 with no aluminum, and pH 5.2 with 30 µg labile aluminum·L-1. The aluminum dose was sublethal and continued for 34 days. Treatment effects on swimming behaviour, metabolism, feeding, food conversion efficiency, and blood parameters were determined. Fish exposed to aluminum displayed hypoactivity that was statistically distinct from both control groups from day 1 onwards. Exposure to acid alone elicited no behavioural effects. There were no significant differences in metabolic rates between the treatment groups. Feeding rates of the fish exposed to aluminum became depressed, reaching a minimum on day 15, and gradually recovered thereafter, but never to the preexposure levels. Swimming behaviour was a more sensitive index of exposure to aluminum than feeding. Fish exposed to aluminum had significantly fewer red blood cells and lower haematocrit than the controls, indicating haemodilution. Aluminum is known to act as a respiratory toxicant, restricting aerobic scope. In addition, these data suggest that fish respond to aluminum exposure by reducing metabolically costly activities such as routine swimming behaviour to allow for the increased maintenance costs associated with acclimation and damage repair.

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